Using absread.

This is a discussion on Using absread. within the C Programming forums, part of the General Programming Boards category; I want to write just a byte to the root directory of a floppy disk at some offset(say 100,root dir ...

Using absread.

I want to write just a byte to the root directory of a floppy disk at some offset(say 100,root dir is sector no 19).How can i do this ?I was recommended to use absread and abswrite.But how to write to offsets without modifying anything else in that sector ?Can you help me in considertation this particular example ?I'll be obliged.